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9p pull request for inclusion in 5.13

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Two small fixes to properly cleanup the 9p transports list if virtio/xen
 module initialization fail.
 9p might otherwise try to access memory from a module that failed to
 register got freed.
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Merge tag '9p-for-5.3' of git://github.com/martinetd/linux

Pull 9p updates from Dominique Martinet:
 "Two small fixes to properly cleanup the 9p transports list if
  virtio/xen module initialization fail.

  9p might otherwise try to access memory from a module that failed to
  register got freed"

* tag '9p-for-5.3' of git://github.com/martinetd/linux:
  9p/xen: Add cleanup path in p9_trans_xen_init
  9p/virtio: Add cleanup path in p9_virtio_init
This commit is contained in:
Linus Torvalds 2019-07-12 17:31:19 -07:00
commit 23bbbf5c1f
2 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
net/9p/trans_virtio.c
View File

@ -767,10 +767,16 @@ static struct p9_trans_module p9_virtio_trans = {
/* The standard init function */
static int __init p9_virtio_init(void)
{
int rc;
INIT_LIST_HEAD(&virtio_chan_list);
v9fs_register_trans(&p9_virtio_trans);
return register_virtio_driver(&p9_virtio_drv);
rc = register_virtio_driver(&p9_virtio_drv);
if (rc)
v9fs_unregister_trans(&p9_virtio_trans);
return rc;
}
static void __exit p9_virtio_cleanup(void)

8
net/9p/trans_xen.c
View File

@ -530,13 +530,19 @@ static struct xenbus_driver xen_9pfs_front_driver = {
static int p9_trans_xen_init(void)
{
int rc;
if (!xen_domain())
return -ENODEV;
pr_info("Initialising Xen transport for 9pfs\n");
v9fs_register_trans(&p9_xen_trans);
return xenbus_register_frontend(&xen_9pfs_front_driver);
rc = xenbus_register_frontend(&xen_9pfs_front_driver);
if (rc)
v9fs_unregister_trans(&p9_xen_trans);
return rc;
}
module_init(p9_trans_xen_init);